Hydrothermal‐Electrochemical Formation of BaTiO, Films: Electrochemical Characterization of the Early Stages of Growth
Hydrothermal‐Electrochemical Formation of BaTiO, Films: Electrochemical Characterization of the Early Stages of Growth
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BaTiO 薄膜的水热电化学形成：生长早期阶段的电化学表征
DOI：
10.1111/j.1151-2916.1997.tb02812.x
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发表时间：
1997
影响因子：
3.9
通讯作者：
Vctor M. Fuenzalida
中科院分区：
文献类型：
--
作者：
T. Vargas;H. Díaz;C. Silva;Vctor M. Fuenzalida
采用电化学方法研究了水热-电化学法制备BaTiO 3薄膜的形成机理。实验在三电极电化学电池中进行，其中钛箔作为工作电极，Ag/AgCl作为参比电极，在0.25M Ba（OH）2溶液中在150°C下。水热-电化学BaTiO 3膜的形成最初由与钛的电化学氧化速率相关的电荷转移控制。该过程后来成为传质控制，推测有关的Ba 2+离子的扩散通过建立BaTiO 3膜。建立了水热-电化学法和纯水热法制备BaTiO 3薄膜的机理之间的关系。
The formation mechanism of BaTiO 3 films produced by a hydrothermal-electrochemical method was characterized using electrochemical techniques. Experiments were conducted in a three-electrode electrochemical cell, with titanium foil as the working electrode and Ag/AgCl as the reference electrode, in a 0.25M Ba(OH) 2 solution at 150°C. Hydrothermal-electrochemical BaTiO3 film formation is initially controlled by charge transfer related to the rate of electrochemical oxidation of titanium. The process later becomes mass transfer controlled, presumably related to the diffusion of Ba 2+ ions across the built-up BaTiO 3 film. A relation between the mechanism of formation of BaTiO 3 films under both the hydrothermal-electrochemical and the pure hydrothermal methods was established.